Darn! I made mistake when i made a poll. There should be one more option called "It's all about the skill, but luck has little importance.".I cannot modify it now (maybe you moderators could if you got the time).

Well maybe there should be MP, for using stronger cards (your mp fills just like chi). That MIGHT balance the luck, cause if you get better cards, you will need a lot of mp to make them worthy. Its just a thought... or maybe you putted something like that already.